Electric air-heater.



F. KUHN 6L J. A. HAND.

ELECTRIC AIR HEATER.

APPLICATION FILED APR. 6. 1918.

1,282,243. Patented 0@I.22,1918.

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FRANK KUHN AND JAY A. HAND, 0E DETROIT, MICHIGAN, AssIGNoEs To AMERICAN ELECTRICAL HEATER COMPANY, MICHIGAN.

OF DETROIT, MICHIGAN, A. CORPORATION OF ELECTRIC AIB-HEATER.

Specification of Letters Patent.r Patented Oct. 22, 1918.

Application led April 6, 1918. Serial No. 226,987.

Figure 1 is a front View of the heater;`

Fig. 2 is a transverse sectional view taken on line 2-2 of Fig. 1;

Fig. 3 is a sectional view of anV end portion of the heater, the section being taken on line 3--3 of Fig. 2.

In these views the reference character 1 designates the end heads of a frame, said heads being rigidly connected by a plate 2 forming the back of the frame and perforated semicylindrical plates 3 form-ing, respectively the top and bottom. To each of the end heads there is secured a .bracket 4 adjustable at various angles with respect to the frame and adapted to secure the same to a floor, wall or other support. 5 is a perforated guard plate extending between the members 3 and the front of the frame and detachably secured to one of said members.- Within said frame there is mounted a heating unit comprising sections 6 and 6, each unit having a pair of end heads 7, said units being mounted in an end to end relation and being ri idly connected by bolts 8 passing throug the adjoiningheads 7 and carrying spacing collars 9 intermediate said adjolning heads so as to provide fora circulation of air between the two units. The heads 1 of the frame have horizontal flanges 10 u on their inner faces which are engagea le by flanges 11 upon the end heads of the heating unit, whereby the latter is properly supported within the frame and may be removed therefrom after detachment of the guard plate 5 by sliding said unit forwardly.

Between the heads 7 of each section of the heating unit there are extended resistors 12 which are coiled upon bushings 13 mounted upon a plurality of rods 14 establishing a rigid relation between the heads 7 The' corresponding ends of the bushingsl of each section have metallic strips 15 clamped thereto establishing the desired electrical connection between the ends of the resistors.

The detachability of the heating unit as above described permits ready repair or renewal of the same. The sectional construction of the units permits the same materials.

to be employed in manufacturing heaters designed for widely varying heating effects and makes possible the removal of one or more sections of a unit for repairs or other purposes without affecting the operativeness of the remaining sections. when the heater is being installed the Aconnection of conductors with the resistors would be difficult and laborious were it not for the ready detachability of the unit.

What we claim as our invention is 1. An electric heater, comprising a frame having end heads, a supporting bracket for said frame, and a heating unit detachably `mounted in said frame and having end heads adapted to slidably engage those of the frame.

2. An electric heater, comprising a frame having end heads, a supportlngbracket for said frame, a detachable front guard, and a heating unit having end heads adapted for sliding engagement with those of the frame and removable through the front of the frame when the guard is detached.

3. An electric heater, comprising a frame having flanged end heads, `a supporting bracket for said frame, and a heating unit having llanged end heads, the flanges of the Furthermore,

heads of said frame and unit being nterf engaged to support the unit in the frame and adapt it to be shifted forwardly` out of the frame.

4.- An electric heater, comprising a frame having end heads, a supporting bracket for said frame and a heating unit detachably mounted in said frame comprising a plurality of sections .each having end heads and resistors extended therebetween, the end heads of adjacent sections being rigidly connected and those at each end of the unit being mounted upon the end heads of the frame.

5. An electric heater, comprising a frame having end heads, and a heating unit mounted between said heads and detachably engageable therewith.

6. An electric heater, comprising a frame having end heads, a supporting bracket for said frame, a heating unit detachably mounted in saidframe having end heads, resistors extending between said heads, insulatory supports for said resistors, and a. niechanical connection between the insulatory supports establishing electrical connection between the resistors thereon.

In testimony whereof we afx our signatures.

FRANK KUHN. JAY A. HAND. 

